1976 Zagreb Mid-air Collision - Air Traffic Control

Air Traffic Control

In the mid-1970s, the Zagreb air traffic control region was one of the busiest in Europe despite being seriously undermanned and poorly equipped. The Zagreb VOR was a reporting point for a number of congested airways between northern Europe and southeastern Europe, the Middle East, and beyond. The airspace was divided into three sectors by altitude: the lower sector below 25,000 feet, the middle sector from 25,000 to 31,000 feet, and the upper sector above 31,000 feet.

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